CompTIA A+ 220-901

Answer: C - SFTP, or Secure FTP, offers a secure alternative to FTP.

Key Takeaway - Secure FTP uses FTP over a secure channel. TFTP, or Trivial FTP, is a less secure version of FTP, focused more on data transfer rather than data integrity. Telnet is an unsecure method of communicating with a remote system, and while HTTPS is a secure version of HTTP (using TLS, or Transport Layer Security, to enhance security), it is not used specifically for file transfer. Note: You may also see SCP, or Secure Copy Protocol, on the exam as an example of a secure protocol.